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US9643265B2 - Method and tool for producing a surface of predetermined roughness - Google Patents

Method and tool for producing a surface of predetermined roughness Download PDF

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Publication number
US9643265B2
US9643265B2 US12/362,528 US36252809A US9643265B2 US 9643265 B2 US9643265 B2 US 9643265B2 US 36252809 A US36252809 A US 36252809A US 9643265 B2 US9643265 B2 US 9643265B2
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United States
Prior art keywords
groove
cutting plate
cutting
cutting tool
recited
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
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US12/362,528
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English (en)
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US20100031799A1 (en
Inventor
Holger Ast
Lutfi Bozkurt
Peter Sommerfeldt
Horst Reimann
Bernhard Gand
Frank Orlamünder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BLITZ 11327 GmbH
Guehring KG
Martinrea Honsel Germany GmbH
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Guehring KG
Martinrea Honsel Germany GmbH
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Application filed by Guehring KG, Martinrea Honsel Germany GmbH filed Critical Guehring KG
Assigned to HONSEL AG, GUEHRING OHG reassignment HONSEL AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SOMMERFELDT, PETER, AST, HOLGER, BOZKURT, LUTFI, GAND, BERNHARD, DR., ORLAMUENDER, FRANK, REIMANN, HORST
Publication of US20100031799A1 publication Critical patent/US20100031799A1/en
Assigned to MARTINREA HONSEL GERMANY GMBH reassignment MARTINREA HONSEL GERMANY GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: MARTINREA 1 GMBH
Assigned to BLITZ 11327 GMBH reassignment BLITZ 11327 GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HONSEL AG
Assigned to MARTINREA 1 GMBH reassignment MARTINREA 1 GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: BLITZ 11327 GMBH
Priority to US14/138,932 priority Critical patent/US10259059B2/en
Priority to US14/560,239 priority patent/US20150151369A1/en
Assigned to Gühring KG reassignment Gühring KG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: GUEHRING OHG
Publication of US9643265B2 publication Critical patent/US9643265B2/en
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Assigned to BLITZ 11327 GMBH reassignment BLITZ 11327 GMBH CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE ADDRESS PREVIOUSLY RECORDED AT REEL: 031071 FRAME: 0667. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: HONSEL AG
Assigned to MARTINREA 1 GMBH reassignment MARTINREA 1 GMBH CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE ADDRESS PREVIOUSLY RECORDED AT REEL: 031071 FRAME: 0714. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF NAME. Assignors: BLITZ 11327 GMBH
Assigned to MARTINREA HONSEL GERMANY GMBH reassignment MARTINREA HONSEL GERMANY GMBH CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE ADDRESS PREVIOUSLY RECORDED AT REEL: 031071 FRAME: 0781. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF NAME. Assignors: MARTINREA 1 GMBH
Expired - Fee Related legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D37/00—Broaching machines or broaching devices
    • B23D37/22—Broaching machines or broaching devices for special purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/06—Profile cutting tools, i.e. forming-tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/141—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness
    • B23B27/145—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness characterised by having a special shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/03—Boring heads
    • B23B29/034—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings
    • B23B29/03403—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable before starting manufacturing
    • B23B29/03428—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable before starting manufacturing by means of an eccentric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B41/12—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for forming working surfaces of cylinders, of bearings, e.g. in heads of driving rods, or of other engine parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/202—Plate-like cutting inserts with special form
    • B23C5/207—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D37/00—Broaching machines or broaching devices
    • B23D37/005—Broaching machines or broaching devices for cylindrical workpieces, e.g. crankshafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D37/00—Broaching machines or broaching devices
    • B23D37/14—Broaching machines with rotatably-arranged working tools
    • B23D37/16—Broaching machines with rotatably-arranged working tools for broaching helical grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D43/00—Broaching tools
    • B23D43/005—Broaching tools for cutting helical grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/08—Honing tools
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/20—Top or side views of the cutting edge
    • B23B2200/204—Top or side views of the cutting edge with discontinuous cutting edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2210/00—Details of turning tools
    • B23B2210/02—Tool holders having multiple cutting inserts
    • B23B2210/022—Grooving tools
    • B23B2210/027—Means for adjusting the grooving inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2215/00—Details of workpieces
    • B23B2215/24—Components of internal combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2215/00—Details of workpieces
    • B23B2215/24—Components of internal combustion engines
    • B23B2215/242—Cylinder liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/04—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/16—Cermet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/12—Boron nitride
    • B23B2226/125—Boron nitride cubic [CBN]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/31—Diamond
    • B23B2226/315—Diamond polycrystalline [PCD]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
    • B23B2228/10—Coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2220/00—Details of milling processes
    • B23C2220/36—Production of grooves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/40—Broaching
    • Y10T409/400175—Process
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/02—Other than completely through work thickness
    • Y10T83/0304—Grooving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9319—Toothed blade or tooth therefor
    • Y10T83/9358—Series of dissimilar teeth

Definitions

  • the invention concerns a method for producing a surface with predetermined roughness, in particular an e.g. cylindrical surface, that has a surface structure of predetermined geometry suitable for application of material by thermal spraying, in which in a substrate surface, preferably premachined to size, a geometrically determined groove structure of minimal depth and width is introduced by means of a tool that is preferably embodied as a follow-on tool, in that a groove cross-section is processed successively to a finished size.
  • the invention concerns a tool for performing such a method as well as a device for performing the manufacturing method.
  • Components of this invention are thus moreover a suitable combination tool, including a honing tool, a manipulation device designed for handling it, as well as a mechanical processing method for a targeted and reproducible manufacture of a defined surface quality and surface geometry.
  • thermal spraying In the field of metallic materials such coatings are often applied by so-called “thermal spraying” wherein, in addition to the so-called flame spraying, recently often the so-called plasma spraying process or arc spraying process has been used.
  • powder particles and/or wire particles are thrown or sprayed at high thermal and kinetic energy onto the surface of the substrate to be coated and form thereon, after temperature dissipation, the desired coating.
  • an engine block is provided with suitable coatings that are applied by thermal spraying, a wear-resistant and friction-reduced bearing surface is provided.
  • the applied matrix for example, steel matrix
  • the applied matrix is subjected when in use to a significant mechanical loading so that for providing a satisfactory service life it is important to bond the coating strongly to the substrate, for example, in the form of cast aluminum. It is particularly important to process the surface of the material to be coated in such a way that a surface with precisely defined geometric parameters is produced that is particularly suitable for thermal spraying, wherein it must be ensured that the manufacturing process is designed such that the desired surface structure can be produced in a reproducible way with minimal variance in order to ensure satisfactory bonding.
  • the invention has therefore the object to further develop a method for producing an e.g. cylindrical surface with predetermined surface structure of the aforementioned kind in such a way that it is suitable for mass production of a substrate surface that is optimally prepared for thermal spraying.
  • a further object resides in that a tool for performing the method is to be provided with which the substrate surface prepared in an optimal way for the application of a material by thermal spraying can be produced in a particularly economical, high-precision manner with minimal shape fluctuations.
  • an object of the invention resides in that a device is to be provided for performing the method by employing the tool according to the invention.
  • the groove structure is introduced into the e.g. cylindrical substrate surface in that first a base groove with a groove bottom width that is less than the groove bottom width of the finished groove is introduced into the substrate surface, and that subsequently the groove, for example, at least one flank of the base groove, is processed by a non-cutting action or a cutting action for producing the groove cross-section, in particular an undercut groove cross-section; with regard to the tool in that the tool comprises a support part on which at least one e.g.
  • substantially parallelepipedal shaping and cutting plate is attached that has at least at one lateral edge, that can be aligned parallel to the cylindrical substrate surface to be processed, with at least three comb-like sequentially arranged teeth, of which a first tooth forms a premachining and safety tooth with a first tooth cross section and a first projecting length, at least one second neighboring tooth forms a groove premachining tooth with a second tooth cross-section that is higher than the first cross-section and a second projecting length that is greater than the first projecting length and at least one third tooth neighboring the second tooth forms a shaping tooth (for example, dovetail tooth) with at least one lateral slanted flank by which the tooth head is enlarged to a tooth width that is greater than the tooth width of the tooth that is previously in engagement; and with regard to the device in that the device comprises a tool support that has at least two degrees of freedom of movement, of which one is the advancing direction of the tool and/or of the workpiece parallel to the axis of rotation of the tool or the workpiece and the
  • the groove structure in the substrate surface is produced in such a way that first a base groove with a groove bottom width that is smaller than a groove bottom width of the finished groove is worked or cut or shaped into a cylindrical substrate surface, for example. Only thereafter this base groove is further processed in a non-cutting or cutting way such that at least on one side or on one flank of the groove worked into the substrate a contour results that is optimally prepared for the future method step of thermal spraying.
  • the at least one flank of the groove is processed in such a way that an undercut or an undercut-like constriction of the groove worked into the surface is produced.
  • the tool can be designed according to an advantageous embodiment as a follow-on tool. Further advantageous embodiments are disclosed in the dependent claims.
  • this upsetting deformation of material can be generated simultaneously with the production of the groove contour and preferably with the same tool. In this way, a particularly effective undercut for creating a strong interlocking action of the spray-on layer to be applied with the cylindrical surface.
  • a particularly advantageous embodiment proposes that the groove is realized by a tool in one working step in different cutting and deformation operations, for example, by means of a follow-on tool, so that the desired surface structure can be produced with simplest kinematics and thus quickly and efficiently.
  • the stepwise processing according to the invention for forming the final groove shape makes it possible to optimize the surfaces of the groove structure, i.e., the groove flanks and/or the bottom of the groove(s), within wide limits in order to optimize the interlocking action between the substrate and the material to be applied.
  • This is realized, for example, in that the processed surface, produced in that, for generating the groove cross-section, the cutting and deformation process is done such that during material removal the surface is roughened and a microstructuring and/or microundercut and/or microroughness is produced, is provided with a microstructure.
  • the tool according to the invention for performing the method is characterized in that the teeth of the e.g. parallelepipedal-shaped shaping and cutting plate that produce the groove structure have upstream thereof a preprocessing and safety tooth that has a reduced projecting length in comparison to the subsequent groove processing or shaping teeth.
  • the preprocessing and safety tooth can therefore be used for guiding and stabilizing the shaping and cutting plate upon immersion into the cylindrical substrate surface.
  • the teeth of the follow-on tool in this way will engage with great precision the substrate to be processed.
  • a tool of such a configuration thus no longer tends to produce the aforementioned “smearing”, in particular, in connection with minimal quantity lubrication (MQL), in the area of the fine toothing so that for the first time it has been achieved that the desired micro-groove structure can be mass-produced with narrow tolerance geometry.
  • MQL minimal quantity lubrication
  • the method according to the invention can be applied for any surface structures of the substrate to be coated.
  • a particularly powerful embodiment of the method results however when the surface to be coated is a cylindrical substrate surface.
  • the groove structure can be produced in that at least one coil-shaped groove is worked into the cylindrical substrate surface in that a tool is being used that - similar to a tapping tool - supports comb-like and redundant, sequentially arranged teeth of different cross-section that successively process one and the same groove.
  • it can be advantageous to shape or impress the base groove into the cylindrical substrate surface.
  • the afore described groove structure is to be configured for preparation of thermal spraying in such a way that the grooves have a very small depth and width. Accordingly, the tool for producing the groove structure must be designed to have a delicate configuration.
  • the method is further developed in that the groove structure is produced in that at least one coil-shaped groove is introduced into the cylindrical surface, a single shaping and cutting part furnished with teeth arranged in a comb-like arrangement is sufficient for producing the groove structure.
  • An especially advantageous substrate surface that has an optimal structure for the subsequent application of a material by thermal spraying results when in the cylindrical surface between the at least one groove generated previously with the same tool an intermediate groove is formed so that undercut-like material deformations in the previously produced groove structure are generated.
  • plastic forming i.e., displacement of substrate in the substrate surface to be provided with the groove structure
  • not only an intermediate groove is produced that increases the contact surface between the substrate and the material to be applied by thermal spraying.
  • the displacement of the substrate material between the depressions of the groove causes a sufficient narrowing of the groove opening so that the sprayed-on layer will interlock particularly effectively and intensively with the substrate material.
  • the tool can be embodied purely as a forming, cutting or honing tool or also as a tool that combines different processing methods, for example, cutting and forming or honing and forming or cutting and honing.
  • a honing tool for example, a cylinder hone
  • radially adjustable tool inserts by employing an expander cone for positioning the cutting edges.
  • abrasive material i.e., abrasive grain
  • PCD diamond
  • boron nitride other comparable shape-stable materials.
  • the abrasive grain that projects from the bonding material has in this case additionally a predetermined geometry that changes in a predetermined way across the axial length of the honing stone so that with adjustment of the axial advancing movement to the relative rotational movement between honing stone and substrate the above described step-wise working of the defined groove structure is possible.
  • the honing stone during the axial relative movement relative to the substrate surface to a radial advancing movement so that the grooves that have been produced by a leading section of the honing stone(s) are gradually ground to full depth.
  • the grooves are therefore steeper and they can even intersect, as a result of the normally provided reciprocating movement of the honing tool. It is even possible in principle to design the honing stones such that displacement projections follow the abrasive grain in a predetermined position that is matched to the kinematics of the honing process so that in this connection the aforementioned undercut-like groove, can be produced by material displacement.
  • a displacement tooth is formed that has across a predetermined length a projecting length corresponding to that of the safety tooth and preferably has at its center section a preferably rounded projection, this mechanical interlocking can be ensured even when the at least one flank of the groove worked into the substrate surface is undercut only slightly or not at all.
  • the embodiments of the tool for performing the method ensure that the tool and particularly the parallelepipedal shaping and cutting plate that is employed are provided with a particularly long tool life travel.
  • a tool is provided with several preferably neighboring shaping teeth with which different flanks of the e.g. undercut groove to be formed can be processed, the several preferably adjacently positioned cutting and impressing teeth cause the forming action and sequentially different flanks of the groove to be formed, for example, with undercuts, can be processed, so that reduced cutting forces at the individual teeth and thus greater service life of the tool will result.
  • tool is characterized in that, adjacent to the at least one shaping tooth embodied e.g. as a dovetail tooth on the side facing away from the safety tooth, additionally a displacement tooth is formed that has across a predetermined length a projecting length corresponding to that of the safety tooth and preferably has at its center section a preferably rounded projection, the tool becomes a cutting and forming tool.
  • the displacement tooth i.e., by providing the displacement tooth across a predetermined length with a projecting length matching that of the safety tooth, the material that is displaced by the rounded projection is displaced mandatorily toward the cut groove so that the groove opening that is facing the material to be applied is additionally constricted.
  • the projecting length of the displacement tooth and thus the projecting length of the safety tooth is selected preferably such that the forming and cutting plate can be introduced with clearance fit or slight press fit into the prepared bore, i.e., into the prepared substrate bore.
  • the safety tooth has a width that is a multiple of the width of the least one groove premachining tooth or the at least one shaping tooth (for example, dovetail tooth). In this way, the guiding action of the shaping and cutting plate and thus the working precision of the tool is further improved.
  • the shaping teeth are comprised of wear-resistant material, preferably, steel or hard material, or wherein the shaping teeth are formed in a cutting insert that has the shape of a prism block or parallelepipedal block and is comprised of a composite part in which a hard material, for example, PCD plate, is seated on a support comprised e.g. of hard metal, preferably attached by brazing, wherein the shaping teeth extend across the separating plane of the two materials, it can be reliably achieved that the groove structure is mass-produced with constant quality while long tool life travel of the tool is ensured.
  • the teeth can be configured to be very delicate with greatest possible precision so that optimal cutting conditions are provided in particular where smallest chip volumes or chip cross-sections occur.
  • the tool is highly loadable because the support or hard metal support that supports the hard material or PCD plate imparts to the tool the required stability, rigidity, and resilience.
  • the teeth are eroded into the composite plate. In this way, it is possible without problems to configure the shaping teeth to extend across the separating plane between hard metal support and PCD plate in a continuous way.
  • the cutting insert is positively in a cutting plate that is embodied, e.g., as an indexable insert, preferably is brazed, or wherein the cutting plate is supported by a holder that is seated adjustably on a tool module in such a way that the cutting insert can be aligned substantially parallel to the axis of the circular-cylindrical surface to be processed, an advantageous fine adjustability of the shaping teeth is provided so that it is possible to distribute the loads onto the teeth machined with high precision as uniformly as possible.
  • FIG. 1 a side view of a first embodiment of the tool for producing a cylindrical inner surface that has a surface structure of predetermined geometry prepared for application of material by thermal spraying;
  • FIG. 2 an end view of the tool according to FIG. 1 according to “II” in FIG. 1 ;
  • FIG. 3 on a greatly enlarged scale the section according to “III-III” through a indexable insert that is provided with cutting insert for producing the surface structure;
  • FIG. 4 the plan view of the indexable insert according to “IV” of FIG. 3 ;
  • FIG. 5 on a greatly enlarged scale the plan view of the cutting insert of the embodiment according to FIG. 4 ;
  • FIG. 6 the section according to “VI-VI” in FIG. 5 ;
  • FIG. 7 the section according to “VII-VII” of FIG. 5 ;
  • FIG. 8 the section according to “VIII-VIII” of FIG. 5 ;
  • FIG. 9 in a view similar to FIG. 3 a further embodiment of the indexable insert with a modified cutting insert.
  • FIG. 10 in a greatly enlarged illustration a part-sectional view of the substrate surface structure producible with the described tool;
  • FIG. 10 a shows purely schematically a coil-shaped groove in a cylindrical surface.
  • a tool will be described with which a cylindrical inner surface of a substrate, in particular a bore of an engine block that has been prepared to size or premachined can be worked in such a way that a layer can be applied by a thermal spraying method in mass production.
  • a liner for example, of steel with traces of other elements, is to be produced, in particular in the form of a matrix with embedded oxide nests and very fine pores.
  • the finished thickness of this layer should then be approximately 0.1 to 0.2 mm wherein after honing this layer exhibits a very smooth surface with very fine pores.
  • the material applied by thermal spraying In order for the material applied by thermal spraying to adhere well on the substrate, i.e., a cast aluminum material, it is required to provide the substrate with a special surface so that interlocking between the material layer applied by thermal spraying and the cast aluminum can be realized across the entire substrate surface in a reproducible way and with constant excellent quality.
  • the cylindrical inner surface of the cast aluminum substrate for example, in case of producing cylinder liners of internal combustion engines, has an axial length of approximately 130 mm and extremely tight cylinder shape tolerances and surface roughness must be complied with.
  • the tool according to the invention is configured such that it produces in the already very precisely premachined cylindrical substrate surface at least one coil-shaped groove with predetermined geometry; this will be explained in the following in more detail.
  • the entire tool is illustrated in FIG. 1 and referenced by reference numeral 12 . It comprises a clamping shaft 14 with a hollow shaft taper (HSK) adjoined by a base member 16 .
  • the axis of the tool 12 is identified at 18 and it can be seen in this illustration that the tool 12 is an extremely rigid and shape-stable tool which is a prerequisite for being able to machine a cylindrical inner surface of the cast aluminum with the predetermined cylinder shape precision.
  • a tool holder 22 that is substantially in the shape of a parallelepiped and by means of a clamping screw 24 can be clamped against two inner surfaces of the pocket 20 positioned at an angle to one another.
  • the reference numeral 26 identifies eccentric pins that, by means of suitable tools, for example, a hexagon socket wrench, can be turned in order to align the holder 22 relative to the axis 18 . It is understood that therefore the clamping screw 24 penetrates a corresponding bore in the holder with play and at an angle to the two contact surfaces of the pocket 22 so that such fine adjustments of the tool holder 22 are possible.
  • a threaded pin is identified which, not illustrated in detail, is supported on a support surface 30 of the pocket 20 so that the holder 22 with contact on the radially inwardly positioned support surface of the pocket 20 is pivotable in a plane parallel to the axis 18 .
  • the holder 22 is secured so as to be adjustable in axial direction, preferably fine-adjustable, by means of an adjusting bolt, not illustrated in detail, that is in contact with an end face 32 of the holder 22 and is pressed or screwed substantially radially into the base body 16 .
  • the tool holder 22 supports the indexable insert 34 that, by means of a central fastening screw 36 interacting with a penetration 35 of the indexable insert, is secured in a detachable way on the tool holder 22 .
  • the indexable insert 34 is comprised of a suitable support material, for example, steel, in particular tool steel. However, it supports on one lateral edge 38 , that is parallel to the tool axis 18 and thus to the cylindrical substrate surface, a cutting insert 40 that substantially extends across the entire length of the indexable insert 34 .
  • a suitable support material for example, steel, in particular tool steel.
  • it supports on one lateral edge 38 , that is parallel to the tool axis 18 and thus to the cylindrical substrate surface, a cutting insert 40 that substantially extends across the entire length of the indexable insert 34 .
  • the indexable insert 34 in the area of the lateral edge 38 has a recess delimited by two surfaces 42 , 44 positioned at a right angle to one another, into which, preferably by brazing, the cutting insert 40 in the form of a parallelepiped with substantially square cross-section is fixedly inserted.
  • FIGS. 3 and 4 show the indexable insert with cutting insert on a greatly enlarged scale. The illustration however shows that the indexable insert 34 only has a thickness D 34 of approximately 4 mm and an edge length of approximately 9.5 mm. Accordingly, the cross-section of the cutting insert 40 is accordingly small with an edge length of approximately 1.1 mm.
  • the cutting insert 40 is a composite part wherein a cutting plate 48 of polycrystalline diamond (PCD) is fixedly seated on a hard metal support 46 .
  • the connection between the parts 46 and 48 is realized by means of brazing.
  • the planar separating plane between the hard metal support 46 and the cutting plate 48 or the PCD cutting plate 48 is identified by reference numeral 50 .
  • FIG. 4 shows that the PCD cutting plate 48 is shorter by a size K then the cutting edge length of the hard metal support 46 so that in this way it is possible to eliminate the risk of damage in regard to the relatively brittle PCD cutting plate 48 .
  • the PCD cutting plate is indicated by cross-hatching.
  • the cutting insert 40 is provided with an extremely delicate toothing that makes it possible to work a groove structure with precisely predetermined geometry, for example, into a cylindrical surface of a cast aluminum part with any diameter, for example, the bore diameter of an internal combustion engine cylinder.
  • at least one groove is to be produced that extends like a thread across the entire axial length of the cylindrical substrate surface and has, for example, a depth T (see FIG. 10 ) of less than 0.15 mm and a width B in the range of maximally 0.2 mm.
  • the pitch S of the groove 52 (see FIG. 10 ) is approximately 0.5 to 0.8 mm.
  • this groove 52 For producing this groove 52 with a geometry according to FIG. 10 the cutting insert 40 is provided with a special toothing that will be explained in the following with reference to FIGS. 5 to 8 in more detail.
  • FIGS. 5 to 8 show the plan view and section illustrations of the cutting insert 40 at a greatly enlarged scale.
  • the total length L of the cutting insert 40 is approximately 9 to 10 mm.
  • the width B 40 of the cutting insert 40 is approximately 1 mm, likewise the entire height H 40 .
  • the PCD cutting plate 48 only has a thickness H 48 of approximately 0.3 to 0.4 mm while the hard metal support 46 has a thickness H 46 between 0.6 and 0.7 mm.
  • the teeth identified by reference numerals 54 - 1 to 54 - 10 are preferably eroded into the lateral surface of the cutting insert 40 across its entire height with the following geometry.
  • a safety tooth 54 - 1 that projects by a height V 54 - 1 from the tooth root surface.
  • the height V 54 - 1 is selected such that the tooth head of the safety tooth 54 - 1 for a finish-adjusted tool holder 22 is substantially positioned at the cylinder running surface diameter, i.e., the premachined inner diameter of the substrate to be coated.
  • the width B 54 - 1 of the safety tooth is approximately 0.3 mm.
  • the premachining tooth 54 - 2 Adjacent to the safety tooth 54 - 1 there follow at a spacing of the pitch S, respectively, two premachining teeth 54 - 2 and 54 - 3 .
  • the premachining tooth 54 - 2 has a substantially narrower tooth cross-section that however projects at a greater projecting length V 54 - 2 from the edge of the cutting insert 40 .
  • the first premachining tooth 54 - 2 emerges by the predetermined length into the prepared substrate surface and generates a base groove that is indicated in FIG. 10 in dash-dotted line 52 B.
  • the shape of the first premachining tooth 54 - 2 is however such that the width B 54 - 2 of the tooth head is smaller than the width B of the finished groove 52 (compare FIG. 10 ). Also, the projecting length V 54 - 2 is selected such that it not yet reaches the diameter DF of the finished contour of the groove 52 . Only by means of the second premachining tooth 54 - 3 the base groove is cut to the full depth T (compare FIG. 10 ) wherein however the width of the groove is substantially kept at the size B 54 - 2 of the first premachining tooth 54 - 2 .
  • shaping teeth Each displaced by the pitch S of the groove 52 to be produced, so-called shaping teeth follow that in the following are referred to as “dovetail teeth” 54 - 4 to 54 - 7 .
  • these shaping teeth must not mandatorily have a flank that upon immersion into the substrate generate an undercut groove.
  • the shaping teeth can moreover work by cutting action as well as in a non-cutting action.
  • the dovetail teeth 54 - 4 to 54 - 7 widen the previously formed base groove in the area of the groove bottom successively to the final size B (see FIG. 10 ).
  • the dovetail teeth 54 - 4 and 54 - 5 shape, i.e., cut, the groove at one flank to an undercut groove shape while the following dovetail teeth 54 - 6 and 54 - 7 form the other flank of the groove in that they carry out a cutting operation.
  • an undercut groove 52 with a contour according to FIG. 10 is present, i.e., with a depth T and a width B at the groove bottom.
  • the cutting operation it is also possible to perform a non-cutting shaping by shaping teeth.
  • a so-called roughening tooth 54 - 8 follows the last shaping tooth or dovetail tooth 54 - 7 and generates with its tooth head a ribbing structure, i.e., a roughened structure 56 with a defined groove depth within the range of 1/100th mm.
  • a so-called cleaning tooth follows the roughening tooth 54 - 8 , or a further displacement tooth 54 - 10 to be described infra, and removes possibly present chips in the cut groove.
  • the cleaning tooth is referenced with the reference numeral 54 - 9 and has a tooth height that is less than the tooth height of the shaping teeth 54 - 4 to 54 - 6 so that the roughened structure 56 will not be contacted.
  • the row of the arranged teeth 54 - 1 to 54 - 9 is completed by a so-called displacement tooth 54 - 10 .
  • This tooth has a tooth head width B 54 - 10 that is a multiple of the width of the premachining or shaping teeth.
  • the displacement tooth 54 - 10 forms a rounded projection 58 that, for example, has a width B 58 of approximately 0.1 mm and a height H 58 of approximately 0.05 mm.
  • the displacement tooth 54 - 10 of the displacement tooth 54 - 10 displaces with its projection 58 the relatively soft material of the substrate, for example, the material of cast aluminum, in a lateral direction so that the undercut groove 52 in the area of the transition into the inner surface 60 is further constricted by upsetting deformations 62 of material.
  • the displacement tooth ensures a reproducible and wear-compensating roughening depth.
  • the projection 58 is positioned at axial spacing A to the cleaning tooth 54 - 9 which spacing differs from the groove pitch S. For example, it is 1.5 times the groove pitch S.
  • the teeth 54 - 1 to 54 - 10 engage the substrate. It can be seen e.g. in FIG. 6 that the relief angle F 54 - 1 of the safety tooth 54 - 1 has a value that is slightly above 0 degrees. It can even be negative.
  • the relief angle F 54 - 4 is definitely positive when the shaping teeth process the inner surface of the substrate by a cutting operation.
  • the rake angle of the premachining teeth, of the roughening tooth 54 - 8 and of the cleaning tooth 54 - 9 is then also positive.
  • the relief angle F 54 - 10 of the displacement tooth 54 - 10 in particular in the area of the projection 58 is significantly smaller. It can even be negative so that the displacement tooth 54 - 10 with the projection 58 will not cut but will displace or deform material of the substrate.
  • the wedge angle of the cutting insert 40 is substantially 90 degrees so that in the illustrated embodiment a slightly negative rake angle results.
  • the teeth 54 - 2 to 54 - 9 are machined into the cutting insert 40 , i.e., into the hard metal support with brazed-on PCD cutting plate, preferably by erosion, so that across the entire height H 40 a uniform tooth height results.
  • this does not apply to the tooth configurations in the area of the safety tooth 54 - 1 and of the displacement tooth 54 - 10 where the tooth height slightly increases with increasing spacing from the cutting edge corner.
  • the tool 12 is aligned with its axis 18 concentrically to the axis of the premachined cylinder running surface so that the radial spacing of the tooth head of the safety tooth 54 - 1 corresponds substantially to half the cylinder running surface diameter of the substrate surface.
  • the holder 22 has been aligned prior to this by means of the adjusting possibilities (eccentric pins 26 , threaded pin 28 ) such that the tooth heads of the shaping teeth 544 to 54 - 7 are substantially parallel to the tool axis 18 in such a way that the tooth line is perpendicular to the coil-shaped groove to be produced, the tool can be moved into the inner bore.
  • V R n R ⁇ S
  • V R is the axial relative speed between the tool 12 and the substrate
  • n R is the relative rotary speed between tool and substrate.
  • the tool or the toothing of the tool has been described in the area of cutting insert 14 in an embodiment in which the teeth have the same cross-section across the entire height H 40 of the cutting insert 40 .
  • the this is not mandatory. It is instead also possible to undercut the teeth, in particular the premachining teeth 54 - 2 and 54 - 3 as well as the shaping teeth 54 - 5 to 54 - 8 , at least in the area of the leading flank in such a way that a positive lateral rake angle for cutting of the groove profile is provided.
  • the additional premachining tooth 54 - 3 begins to work which machines or cuts the base groove to the full depth T.
  • the premachining tooth 54 - 3 can be omitted so that the first shaping tooth 54 - 4 will begin to work.
  • This first shaping tooth 54 - 4 cuts a first undercut flank 52 - 1 in such a way that a somewhat wider groove bottom results.
  • This groove bottom is recut by the second shaping tooth 54 - 5 so that the groove bottom on one side has been cut to full width B/2.
  • the shaping teeth 54 - 6 and 54 - 7 complete by stepwise cutting the other undercut flank 52 - 2 and subsequently the roughening tooth 54 - 8 produces the roughened section 56 .
  • the premachining tooth 54 - 2 as well as the premachining tooth 54 - 3 are embodied as a combination tooth that cuts as well as produces roughness. It is however also possible to design the premachining teeth 54 - 2 and 54 - 3 as shaping and deforming teeth, i.e., as teeth that only displace the soft material of the substrate.
  • FIGS. 1 through 8 shows the insert of the cutting insert part 40 in a rectangular recess ( FIG. 3 ) with the surfaces 42 and 44 that are oriented such that for a parallelepipedal design of the cutting insert 40 a negative rake angle results.
  • the dash-dotted line 64 therefore indicates in FIGS. 6-8 a surface that is produced when the topside of the cutting insert 40 is removed at a slant to the hard metal support 46 so that a positive rake angle is formed.
  • FIG. 9 shows a variant of the tool, more precisely of the indexable insert with brazed-on cutting insert in which a wedge angle smaller than 90 degrees with positive rake angle and positive wedge angle can be achieved even when the hard metal support as well as the PCD cutting plate have plane-parallel edge surfaces which ensures a simplified manufacture.
  • those components that corresponds to the elements of the afore described embodiment are provided with similar reference numerals that however have a “1” placed in front.
  • the indexable insert 134 has a differently oriented recess for the cutting insert 140 .
  • the surfaces 142 and 144 are still positioned at a right angle to one another but the bottom surface 144 is slanted in opposite direction relative to the bottom surface 44 of the embodiment according to FIG. 3 .
  • a toothing is produced by erosion with the geometry according to FIG.
  • the cutting insert embodied as a follow-on tool can be very precisely machined and as a result of the composite configuration is imparted with an improved stability at the important locations so that the cutting edges work exactly and reliably for a long period of time.
  • the undercut of the groove 52 can moreover be significantly enhanced so that the mechanical interlocking or engagement between the applied material and the aluminum substrate is significantly improved.
  • PCD cubic boron nitride
  • CVD diamond instead of the hard material PCD also another hard material, for example, cubic boron nitride (CBN) or also CVD diamond can be employed. It would also be possible in the area of cutting edges to work with different hard materials, for example, cermet materials.
  • the invention is also not limited to providing a cylindrical inner surface with a groove structure of predetermined geometry.
  • an outer surface or even a planar surface can be provided with a corresponding groove structure wherein a method as afore described can be used.
  • the tool in this case would be embodied as a planing or broaching tool in which the teeth will machine sequentially the groove to the full cross-section like a follow-on tool.
  • the afore described tool has teeth that extends substantially in the circumferential direction, i.e., the cutting insert 40 is provided with straight toothing. It is also possible to provide the teeth so as to be slightly slanted.
  • the tool 12 In deviation from the afore described embodiment it is also conceivable to furnish the tool 12 with several cutting inserts that are distributed about the circumference; in this case the grooves could then be introduced like a multi-start thread into the substrate, i.e., shaped or cut.
  • This modification of the tool leads to a kind of honing tool wherein the honing stones, that can extend across a significant length or across the entire length of the surface to be machined, are to be provided with a suitable geometry for producing the groove structure.
  • the tool can also be embodied purely as a shaping, cutting or honing tool or also as tool that combines the different machining types, for example, cutting and shaping and/or honing and shaping and/or cutting and honing. It can also be advantageous to utilize the tool configuration of a honing tool, for example, a cylinder hone, with radially adjustable tool inserts with the aid of an expander cone for positioning the cutting edges.
  • abrasive material i.e., abrasive grain
  • PCD diamond
  • boron nitride other comparable shape-stable materials.
  • the abrasive grain that projects from the bonding material is provided in this case additionally with a predetermined geometry or spatial shaping that in a predetermined way changes such across the axial length of the honing stone that by adjusting the axial advancing movement to the relative rotational movement between honing stone and substrate the above described stepwise or gradual incorporation of the defined groove structure is enabled.
  • the envelope of the abrasive material in this case is a conical wall so that the leading abrasive grains in the advancing direction project less from the bonding material than the following abrasive grains.
  • this envelope is in the form of a double cone that tapers in both axial directions away from the axial center.
  • the honing stone during the axial relative movement relative to the substrate surface is subjected to a radial advancing movement so that the grooves that are introduced by the leading section of the honing stone(s) are ground gradually to full depth.
  • the envelope of the abrasive material can be in the form of a cylinder wall.
  • the grooves become steeper and they can also intersect, as a result of the normally provided reciprocating movement of the honing tool. It is even principally possible to design the honing stones in such a way that displacement projections are arranged behind the abrasive grains in predetermined positional relation matched to the kinematics of the honing process so that also the undercut-like groove constriction that has been explained in connection with the method wherein the worked-in groove structure is deformed in such a way that the groove openings are constricted by upsetting deformations of material can be achieved by material displacement.
  • the base body 16 When the tool according to FIG. 1 is furnished with a single indexable insert, it can be advantageous to provide the base body 16 with guide ledges distributed about the circumference that ensure that the tool in cooperation with the safety tooth is guided safely in the substrate bore.
  • FIG. 1 shows two balancing screws referenced by reference numeral 68 with which a fine balancing of the tool is possible.
  • the invention therefore provides a method for producing a preferably cylindrical surface that has a surface structure of predetermined geometry suitable for application of material by thermal spraying.
  • a geometrically determined groove structure of minimal depth and width is introduced into a preferably cylindrical surface of a substrate to be coated that has been preferably premachined to size in that a groove cross-section is successively processed to the final size. This processing is done according for example by a follow-on tool.
  • the method is design such that the groove structure is worked in such that first a base groove with a groove bottom width is introduced that is less than the groove bottom width of the finished groove.
  • the groove for example, at least one of the flanks of the base groove, is processed for producing an undercut groove profile by a non-cutting action or a cutting action, wherein preferably the worked-in groove structure is deformed in such a way th at the groove openings are constricted by upsetting deformation of material.

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  • Engineering & Computer Science (AREA)
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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Drilling Tools (AREA)
  • Milling Processes (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
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DE102008058452A DE102008058452A1 (de) 2008-08-05 2008-11-21 Verfahren und Werkzeug zur Erzeugung einer Oberfläche vorbestimmter Rauheit
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